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【简答题】
根据质谱图(图6—16)确定化合物C6H15NO的结构，并写出主要裂解过程。
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反馈参考答案：
举一反三
【简答题】句型转换 1. She used the knife to cut the fruit a moment ago. (改为被动语态) The knife ______ ______ to cut the fruit by her a moment ago. 2. The teacher was angry with him for being late. (改为同义句) The teacher w...
【单选题】At such a time of crisis, we must try to _______ differences of party or class and stick together.
A.
set forth
B.
set back
C.
set down
D.
set aside
【简答题】根据画线单词及句意提示填空。 1. You used to be short . But now you're so ． 2. My brother used to be quiet . But now he is very . 3. His mother is very serious , but his father is quite . 4. I used to be afraid of E...
【单选题】She asked me, “Have you seen my _____?”
A.
sport shoe
B.
sports’ shoes
C.
sport’s shoes
D.
sports shoes
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